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Thread: Quick question about powering a 3.7v led

  1. #1

    Default Quick question about powering a 3.7v led

    I am working on a project and the LED's I want to use have a forward voltage of 3.7 v typ - 4.5 max. 20mA typ The blaster core sound effect card outputs 3.3 v 18mA on the ray progression outputs.. Does this mean I cant use the LEDs I would like to use? Or will they just not be as bright?

  2. #2


    You can use them. They won’t likely be at their maximum brightness, but they’ll still be bright.
    All n00bs READ these first (PLEASE)!!!:
    1. Forum Guidelines
    2. FJK’s “Down and Dirty” guide to Ohm’s Law

    "Yeah, yeah, I've heard it all before... you want blindingly bright, super loud, running 1138 blinkies off of the cheapest sound card you can find AND you want all of it to run on a battery the size of a dime, and run for a very, VERY long time. That one cracks me up every time..."
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  3. #3


    Thanks... That's what I figured.. I am just waiting for the rest of my stuff to be delivered tomorrow... I already 3d printed parts I needed..


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